tests: improve test result information

test/jsonform_test.js

@@ -140,10 +140,20 @@
           return gadget.getContent();
         })
         .push(function (json_document) {
-          assert.deepEqual(schema, schema_orig, "schema not change (side effect absent)");
-          assert.deepEqual(JSON.parse(json_document[key]), value, "returned value equal");
+          var returned_value;
+          assert.ok(json_document.hasOwnProperty(key), "getContent does not content property");
+          assert.deepEqual(schema, schema_orig, "schema changed (side effect on schema)");
+          try {
+            returned_value = JSON.parse(json_document[key]);
+          } catch (error) {
+            assert.notOk("value not parsable:'" + returned_value + "'\n" + error);
+          }
+          assert.deepEqual(returned_value, value,
+            "document changed without user interact (side effect on data)");
         })
         .push(undefined, function (error) {
+          console.log(assert.test.module.name + ': ' + assert.test.testName);
+          console.error(error);
           assert.notOk(error, "issue in gadget");
         })
         .push(function () {